Comparison of Methods for Determining the Ferrite Content in Duplex Cast Steels

• Autorzy: Kaňa V. , Pernica V. , Zadera A. , Krutiš V.
• Języki publikacji: EN

Abstrakty

EN

The paper is concerned with comparing the methods for determining the ferrite content in castings from duplex stainless steels. It uses Schaeffler diagram, empirical formula based calculation, image analysis of metallographic sample, X-ray diffraction and measurement with a feritscope. The influence of wall thickness of the casting on the ferrite content was tested too. The results of the experiments show that the casting thickness of 25 or 60 mm does not have a significant effect on the measured amount of ferrite. The image analysis of metallographic sample and the measurement with the feritscope appear to be the most suitable methods. On the contrary, predictive methods, such as Schaeffler diagram or empirical formula based calculation are only indicative and cannot replace the real measurements. X-ray diffraction seems to be the least suitable measuring method. Values of ferrite content measured in such a way often deviated from the values measured by image analysis and with feritscope.

Słowa kluczowe

EN

non-destructive testing; duplex cast steel; metallographic evaluation; XRD; ferritoscope

PL

badania nieniszczące; staliwo; metalografia; XRD; ferryt; zawartość ferrytu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 2
• Strony: 85--90
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Kaňa V.

• Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Brno, Czech Republic

autor

Pernica V.

• Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Brno, Czech Republic

autor

Zadera A.

• Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Brno, Czech Republic

autor

Krutiš V.

• Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Brno, Czech Republic

Bibliografia

• [1] Nilsson, J.O., Chai, G., Kivisäkk, U. Recent development of duplex stainless steels [Online]. In CEDINOX - Stainless Steel. Sweden: R&D Centre, Sandvik Materials Technology. Retrieved from http://www.cedinox.es/opencms901/export/ sites/cedinox/.galleries/publicaciones-tecnicas/13-DUPLEX-SSSM_proceedings08_EN-5.pdf.
• [2] Stejskal, M. (2018). Influence of Chemical Composition and Heat Treatment on Structure and Properties of Two-Phase Austenitic-Ferritic Stainless Steels. Czech Republic: Diploma thesis, Brno University of Technology, Brno. (in Czech).
• [3] Practical Guidelines for the Fabrication of Duplex Stainless Steels. (2014) (3rd edition). London (UK): International Molybdenum Association (IMOA). ISBN 978-1-907470-09-7.
• [4] Bermejo, M.A.V. (2012). Predictive and Measurement Methods for Delta Ferrite Determination in Stainless Steels. Welding Journal. 91(4), 113-121.
• [5] Nusatek. Ferrite content measurement (Ferritescope test). Retrieved February 6, 2019, from http://www.nusatek.com/ on-site-material-inspection/ferrite-content-measurement-ferritescope-test.html.
• [6] Saluja, R. & Moeed, K.M. (2015). Formation, Quantification and Significance of Delta Ferrite for 300 Series Stainless Steel Weldments. International Journal of Engineering Technology, Management and Applied Sciences. 3 (spec. issue), 23-36. ISSN 2349-4476.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)